Let f(c) = limn--oo +2a+3+sin na)"+1 " then (a2ax+3+sin mz)"-1 (1) f(r) is continuous and differentiable for all c e r (2) f(r) is continuous but not differenti

Let f(c) = limn--oo +2a+3+sin na)"+1 " Then (a2ax+3+sin mz)"-1 (1) f(r) is continuous and differentiable for all c E R (2) f(r) is continuous but not differentiable for all a E R (3) f(r) is discontinuous at infinite number of points (4) f(«) is discontinuous at finite number of points